Corporate Headquarters Fabric Filter Engineering Office 

 6690 West Nine Mile Road – Pensacola, Florida 32526 921 East Wind Dr. Ste. 115 – Westerville, OH 43081 

 

 Phone: 850/944-4475 – Facsimile 850/944-8270 

 E-mail Address: apcsales@sei-group.com – Web: WWW.sei-group.com

March 11, 2013 

 

 VIA ELECTRONIC MAIL 

 Didier.Salvador@lhoist.com 

 

Lhoist North America 

Attention: Didier Salvador 

 

Reference: Budget Inquiry for SO2 Removal on Two Lime Kilns 

Subject: Southern Environmental, Inc. Budget Proposal No. P13-117 

Dear Mr. Salvador, 

We are pleased to present the following proposal as you requested. The pricing 

and design details are preliminary. When the project progresses, we will be happy 

to revise this to a firm proposal. 

SYSTEM OPERATION: 

The flue gas makes a horizontal entrance into the spray dryer vessel through an 

inlet plenum that evenly distributes the flue gas to the cross section. Quick lime is 

prepared with a slaking system and mixed into slurry for injection into the spray 

dryer. Compressed air is used to atomize the water and slurry mixture. After the 

slurry is injected, the water evaporates and as it does so, the lime reacts with the 

acid gasses in a wet environment, providing efficient scrubbing of the acids. The 

system is designed so that all the water is totally evaporated, giving a dry 

discharge of cooled flue gas. A temperature control loop modulates the flow of 

water to maintain the outlet set point temperature, regardless of fluctuations in the 

flue gas flow and temperature, while slurry flow is independently modulated to 

maintain the desired SO2 emissions. 

Quicklime is delivered to a storage silo by means of self-unloading bulk trucks. 

The truck blower conveying air is filtered by the silo dust collector and vented to 

atmosphere. Discharge of lime from the silo is assisted by a vibrating bin activator 

(live bottom) mounted to the cone. The lime discharges to the conveyor/feeder 

which feeds a detention slaker. Lime slurries are automatically prepared as 

required with the resultant slurry discharging into a slurry tank contained within the 

silo slurry skirt. Lime slurry is continuously re-circulated in a recycle loop back to 

the mixed tank with slurry taken off the loop as required. Oversize grit particles 

 SOUTHERN environmentalINC. Air Pollution Control Systems
Lhoist North America 

SEI Proposal P13-117 

March 11, 2013 

2 

are removed by a screen. There are redundant slurry and fresh water pumps for 

independently supply. 

The polluted flue gas flows into the existing fabric filter (baghouse). Virtually all 

solid particulate is filtered out. The accumulation of particulate on the bags forms 

a "filter cake" that helps fill the voids between bag fibers and enhances the 

filtration efficiency. Also, the unreacted reagent becomes a part of the filter cake 

and provides a considerable amount of additional gas scrubbing. Contact 

between the flue gas and reagent is particularly intimate because of the dense 

cake and very slow gas movement. 

The build-up of particulate on the bags causes a restriction to flow (increase in 

pressure drop) and periodically the bags are cleaned by a jet of compressed air 

that is blown down the inside of the bags. The bag inflates rapidly, snaps when it 

reaches its full diameter, and the particulate on the outside of the bag is thrown off 

and settles into the hopper where it is removed to disposal. . 

Cleaned flue gas is ducted to the ID fan and discharged to atmosphere. 

SCOPE OF SUPPLY: 

The following system components are provided for each ACQS system unless 

noted otherwise: 

1. Two (2) Spray Dryers, each including: 

1.1. Horizontal connection inlet plenum 

1.2. Inlet plenum, cylinder, and discharge hopper with inspection/access 

door 

1.3. Hopper heat on the lower one-third of the hopper. 

1.4. Slurry nozzles with air and slurry supply lances, flexible hoses, and 

shut off valves 

1.5. Piping manifolds for single point utility connections 

1.6. Hopper discharge airlock 

2. Two (2) Reagent Storage and Supply Systems, each including: 

2.1. Bolted steel storage silo (skirt supported) 

2.2. Fill line 

2.3. Vibrating bin bottom discharger 

2.4. Aeration pads to aid material discharge 
Lhoist North America 

SEI Proposal P13-117 

March 11, 2013 

3 

2.5. Isolation knife gate valve 

2.6. Rotary feeder with zero speed switch 

2.7. Bin vent filter (dust collector) 

2.8. Volumetric feeder (screw type) 

2.9. Lime slaker 

2.10. Vibrating grit screen 

2.11. Grit screw conveyor 

2.12. Lime slurry tank 

2.13. Lime slurry tank agitator 

2.14. Slaker exhaust fan 

2.15. Skirt heater 

2.16. Silo fill panel 

2.17. Local operator station (to interface with client supplied controls) 

3. Slurry pump skid factory assembled, wired, and piped with the following: 

3.1.1. Three (3) slurry supply pumps (one for each kiln and one is a 

common stand-by). 

3.1.2. Flow control valves with actuators 

3.1.3. Strainers, regulators, valving, and interconnecting piping. 

3.1.4. Pipe headers and spray nozzles for lime slurry injection. 

3.1.5. Pipe for supply of lime slurry and air to spray dryer. 

4. Cooling water pump skid factory assembled, wired, and piped with the 

following: 

4.1.1. Three (3) water supply pumps (one for each kiln and one is a 

common stand-by). 

4.1.2. Flow control valves with actuators 

4.1.3. Regulators, valving, and interconnecting piping. 

4.1.4. Pipe headers and spray nozzles for water injection. 

4.1.5. Pipe for supply of water and air to spray dryer. 

5. Access Provisions to all normally serviced, elevated areas, as described in 

the Specifications 

6. Field Instrumentation and control description to allow interface with 

customer supplied control system. 
Lhoist North America 

SEI Proposal P13-117 

March 11, 2013 

4 

APPLICATION, SIZING, & OPERATING DATA: 

(NOTE: All values given are for normal operating conditions, unless identified 

otherwise) 

1. PROCESS INFORMATION: The system design is based on the following 

design parameters. 

 Kiln 1 Kiln 2 

Volume (dscfm) 67,000 82,000

Volume (acfm) 126,792 158.491

Temperature (°F) 500 540

Gas Composition (% vol) 

CO2 20 20

H2O 4 2

N2 66 68

O2 10 10

SO2 (lb/hr) 92 436

 

2. SYSTEM PERFORMANCE: The following is the system design 

performance. In a firm proposal there will be conditions and limitations on 

any performance guarantee. 

2.1. SO2 90% reduction

 

3. SPRAY DRYER Kiln 1 Kiln 2 

3.1. Inlet volume (acfm): 126,792 158.491

3.2. Inlet temperature (°F): 500 540

3.3. Outlet volume (acfm): 92,269 112,237

3.4. Outlet temperature (°F): 160 160

3.5. Water supply (gpm): 50 67

3.6. Quicklime supply (lb/hr): 150 500

3.7. Atomizing air required 

(scfm @ 100 psig): 

800 1100

3.8. Slurry nozzles: 6 6

3.9. Size (overall): 20’ OD x 95’H 24’ OD x 95’H

3.10. Retention time 11.5 sec 12 sec

3.11. Slaker capacity (lb/hr): 2500 2500
Lhoist North America 

SEI Proposal P13-117 

March 11, 2013 

5 

4. WATER PUMPS (3 each as follows) 

4.1. Type: Multi-stage centrifugal 

4.2. Capacity: 75 gpm 

4.3. Pressure: 150 psig 

4.4. Motor size: 15 hp 

5. SLURRY PUMPS (3 each as follows – common for both systems) 

5.1. Type: Centrifugal 

5.2. Capacity: 75 gpm 

5.3. Pressure: 300 TDH 

5.4. Motor size: 20 hp 

 

BUDGET PRICING: 

Kiln 1 Kiln 2

EQUIPMENT SUPPLY $ 1,863,000 $1,947,000

FREIGHT ESTIMATE: $ 100,000 $100,000

PURCHASER TO FURNISH: The following items are not included in the 

above pricing. They may be required on this project. 

1. Permits, licenses, and all applicable taxes and duties 

2. ID fan system 

3. Compressed air system 

4. All ash removal equipment 

5. Motor starters and motor controls 

6. System controls 

7. All ductwork 

8. Discharge stack and stack testing access provisions 

9. Foundations and system erection 

10. Area lighting and convenience outlets 

11. All emission monitoring equipment and testing 

12. Supply of all reagents 
Lhoist North America 

SEI Proposal P13-117 

March 11, 2013 

6 

FIELD SERVICE: 

A field service representative will be provided at the rates in effect at the time the 

service is performed. A current field service rate sheet is attached. 

SCHEDULE: 

The project schedule is subject to review at the time of order. Following is a typical 

schedule. An accelerated schedule can normally be provided if required. 

General arrangement (approval) drawings: 4-6 weeks 

General arrangement (certified) drawings: 3-4 weeks after approval 

Equipment shipment: 24-26 weeks after approval. 

Normally this is a total of 

36-42 weeks after receipt of 

the order 

We appreciate your consideration of an air pollution control system by Southern 

Environmental Inc. We will be glad to provide any additional information, 

additional pricing, or support your project in any way that we can. Please do not 

hesitate to call on us. 

Very truly yours, 

SOUTHERN ENVIRONMENTAL, INC. 

Charles T. Hayes 

Charles T. Hayes 

Regional Sales Director 

Prepared by: 

Wes McKenzie – Director of Fabric Filter Technology 

Cc: Michael Johnson – SEI 

 
Corporate Headquarters Fabric Filter Engineering Office 

 6690 West Nine Mile Road • Pensacola, FL 32526 921 Eastwind Drive, Suite 115 • Westerville, OH 43081 

 P 850.944.4475 • F 850.944.8270 P 614.259.6505 • F 614.259.6510 

 Email: apcsales@sei-group.com • Web: www.sei-group.com 

PER DIEM RATES FOR FIELD TECHNICAL SERVICE

Effective 01 January 2012 

Southern Environmental, Inc. (SEI) can provide you with one (1) or more of our Field 

Technical Service Engineers to perform a variety of staff augmentation tasks; for 

example, unit inspections, equipment evaluations, performance assessments, control 

system tune ups, conducting staff training classes, technical assistance on new unit 

construction or major rebuilds, and commissioning of new units. These services can be 

provided on a per diem basis per the following rate schedule. 

EXPENSES

All living and travel expenses will be charged per calendar day, on a seven (7) day per 

week basis including expense incurred while traveling. Travel expense will be based on 

travel to and from the job site. Local travel expenses are those incurred while on the job 

site. All travel and living expenses will be billed at actual cost, plus a ten percent (10%) 

administrative fee. 

TRAVEL TIME

Travel time will be billed at One-Hundred-Five Dollars ($105.00) per hour for actual 

time traveled for initial travel to and return travel from the job site. The maximum travel 

time billed for travel in either direction will be eight (8) hours, irrespective of actual time 

the travel takes for domestic travel. Actual travel hours will be charged for 

international travel. 

BILLING RATES

The per diem billing rate for SEI Field Technical Service Engineers is Nine Hundred 

Dollars ($900) per eight (8) hour day. Hours in excess of eight (8) hours will be billed at 

one and one-half (1 1/2) times the straight time rate. Hours worked on a Saturday or 

Sunday will be billed at one and one-half (1 1/2) times the straight time rate. Hours 

worked on nationally recognized holidays will be billed at two (2) times the straight time 

rate. Work hours are limited to no more than sixteen (16) hours per twenty-four (24) 

hour period. The writing of the inspection report will be billed at $112.50 per hour. 

All billing rates are quoted in U.S. Currency.

Southern Environmental, Inc. makes no warranty claim for Field Technical Services 

performed; WARRANTIES OF MERCHANTABILITY OR FITNESS FOR PURPOSES 

ARE SPECIFICALLY DISCLAIMED.